AT97SC3204-U2MA-20 Equivalent & Substitute Parts

Part Overview

The AT97SC3204-U2MA-20 is an embedded cryptographic Trusted Platform Module (TPM) integrated circuit manufactured by Microchip Technology. This device implements the CryptoController™ series architecture with LPC interface connectivity, designed for secure cryptographic operations in embedded systems. The part is currently in active production status with 1122 units available in new original inventory. Substitute parts are identified when equivalent functional requirements can be met through alternative Microchip TPM offerings that maintain compliance with industry standards while accommodating different interface protocols or package configurations.

Substiute Parts

AT97SC3204-U2MA-20

Microchip TechnologyIn Stock: 1154AT97SC3204-U2MA-20 Datasheet

Current PartRFQ

AT97SC3205-H3M4200B

Microchip TechnologyIn Stock: 979AT97SC3205-H3M4200B Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The AT97SC3205-H3M4200B is identified as a manufacturer-recommended substitute for the AT97SC3204-U2MA-20. Substitution eligibility is determined by the following critical parameters:

Common Substitution Criteria:

• Manufacturer: Microchip Technology (same source)
• Application: Trusted Platform Module (TPM) functionality
• Core Processor: AVR architecture
• Program Memory Type: EEPROM
• Voltage Supply: 3.3V (identical operating voltage)
• Operating Temperature Range: -40°C to 85°C (identical thermal envelope)
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 3 (168 Hours)
• REACH Status: REACH Unaffected
• Product Status: Active

Interface Difference: The substitute part operates with SPI interface instead of LPC interface. This represents a functional protocol change that requires circuit-level design accommodation and cannot be considered a pin-compatible drop-in replacement.

Package Difference: The substitute part uses 32-VFQFN Exposed Pad (4x4) packaging versus the original 40-VFQFN Exposed Pad (6x6) configuration, resulting in different pin counts and physical footprints.

Parameter Comparison

Engineering Selection Recommendations

Both the AT97SC3204-U2MA-20 and AT97SC3205-H3M4200B maintain active product status with full compliance to ROHS3 and REACH requirements. Selection between these parts is determined by interface protocol requirements and physical board layout constraints.

The AT97SC3204-U2MA-20 is the appropriate selection for designs requiring LPC interface connectivity with 40-pin VFQFN packaging. The AT97SC3205-H3M4200B serves applications where SPI interface protocol is specified and 32-pin VFQFN (4x4) package dimensions are compatible with the target PCB layout. Both devices operate identically across voltage supply, temperature range, and cryptographic functionality parameters.

Frequently Asked Questions (FAQ)

Q: Can the AT97SC3205-H3M4200B be used as a direct replacement for the AT97SC3204-U2MA-20?

A: No. While both devices share identical voltage supply, operating temperature range, and TPM functionality, they differ in interface protocol (LPC versus SPI) and package configuration (40-pin versus 32-pin VFQFN). These differences require circuit redesign and cannot support pin-compatible substitution.

Q: What is the primary functional difference between these TPM devices?

A: The primary difference is the communication interface. The AT97SC3204-U2MA-20 uses LPC (Low Pin Count) interface, while the AT97SC3205-H3M4200B uses SPI (Serial Peripheral Interface). Both implement equivalent cryptographic TPM functionality but require different host controller communication protocols.

Q: Are both parts suitable for industrial temperature applications?

A: Yes. Both devices operate across the -40°C to 85°C temperature range, meeting industrial embedded system requirements.

Q: What packaging considerations apply to these parts?

A: The AT97SC3204-U2MA-20 uses 40-VQFN (6x6) packaging, while the AT97SC3205-H3M4200B uses 32-VQFN (4x4) packaging. These represent different physical footprints and pin counts. PCB layout and routing must accommodate the selected package configuration.

Q: Do both parts meet environmental compliance standards?

A: Yes. Both devices are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for embedded integrated circuits.

Q: What is the moisture sensitivity classification for these TPM devices?

A: Both parts carry MSL 3 (168 Hours) classification, indicating standard moisture sensitivity handling requirements for surface mount components.